<template>
  <div>
    <!-- <el-drawer v-bind="$attrs" v-on="$listeners" @opened="onOpen" @close="onClose"> -->
          <el-drawer v-bind="$attrs"   @opened="onOpen" @close="onClose">

      <div style="height: 100%">
        <el-row style="height: 100%; overflow: auto">
          <el-col :md="24" :lg="12" class="left-editor">
            <div class="setting" title="资源引用" @click="showResource">
              <el-badge :is-dot="!!resources.length" class="item">
                <i class="el-icon-setting" />
              </el-badge>
            </div>
            <el-tabs v-model="activeTab" type="card" class="editor-tabs">
              <el-tab-pane name="html">
                <template #label>
                  <i v-if="activeTab === 'html'" class="el-icon-edit" />
                  <i v-else class="el-icon-document" />
                  template
                </template>
              </el-tab-pane>
              <el-tab-pane name="js">
                 <template #label>
                  <i v-if="activeTab === 'js'" class="el-icon-edit" />
                  <i v-else class="el-icon-document" />
                  script
                 </template>
              </el-tab-pane>
              <el-tab-pane name="css">
                 <template #label>
                  <i v-if="activeTab === 'css'" class="el-icon-edit" />
                  <i v-else class="el-icon-document" />
                  css
                 </template>
              </el-tab-pane>
            </el-tabs>
            <div v-show="activeTab === 'html'" id="editorHtml" class="tab-editor" />
            <div v-show="activeTab === 'js'" id="editorJs" class="tab-editor" />
            <div v-show="activeTab === 'css'" id="editorCss" class="tab-editor" />
          </el-col>
          <el-col :md="24" :lg="12" class="right-preview">
            <div class="action-bar" :style="{ 'text-align': 'left' }">
              <span class="bar-btn" @click="runCode">
                <i class="el-icon-refresh" />
                刷新
              </span>
              <span class="bar-btn" @click="exportFile">
                <i class="el-icon-download" />
                导出vue文件
              </span>
              <span ref="copyBtn" class="bar-btn copy-btn">
                <i class="el-icon-document-copy" />
                复制代码
              </span>
              <span class="bar-btn delete-btn" @click="$emit('update:visible', false)">
                <i class="el-icon-circle-close" />
                关闭
              </span>
            </div>
            <iframe
              v-show="isIframeLoaded"
              ref="previewPage"
              class="result-wrapper"
              frameborder="0"
              src="preview.html"
              @load="iframeLoad"
            />
            <div v-show="!isIframeLoaded" v-loading="true" class="result-wrapper" />
          </el-col>
        </el-row>
      </div>
    </el-drawer>
    <resource-dialog
 
      v-model="resourceVisible"
      :origin-resource="resources"
      @save="setResource"
    />
  </div>
</template>
<script>
  import { parse } from "@babel/parser";
  import ClipboardJS from "clipboard";
  import { saveAs } from "file-saver";
  import {
    makeUpHtml,
    vueTemplate,
    vueScript,
    cssStyle,
  } from "@/components/generator/html";
  import { makeUpJs } from "@/components/generator/js";
  import { makeUpCss } from "@/components/generator/css";
  import { exportDefault, beautifierConf, titleCase } from "@/utils/index";
  import ResourceDialog from "./ResourceDialog.vue";
  import loadMonaco from "@/utils/loadMonaco";
  import loadBeautifier from "@/utils/loadBeautifier";

  const editorObj = {
    html: null,
    js: null,
    css: null,
  };
  const mode = {
    html: "html",
    js: "javascript",
    css: "css",
  };
  let beautifier;
  let monaco;

  export default {
    components: { ResourceDialog },
    props: ["formData", "generateConf"],
    data() {
      return {
        activeTab: "html",
        htmlCode: "",
        jsCode: "",
        cssCode: "",
        codeFrame: "",
        isIframeLoaded: false,
        isInitcode: false, // 保证open后两个异步只执行一次runcode
        isRefreshCode: false, // 每次打开都需要重新刷新代码
        resourceVisible: false,
        scripts: [],
        links: [],
        monaco: null,
      };
    },
    computed: {
      resources() {
        return this.scripts.concat(this.links);
      },
    },
    emits:['save'],
    watch: {},
    created() {},
    mounted() {
      window.addEventListener("keydown", this.preventDefaultSave);
      const clipboard = new ClipboardJS(".copy-btn", {
        text: (trigger) => {
          const codeStr = this.generateCode();
          this.$notify({
            title: "成功",
            message: "代码已复制到剪切板，可粘贴。",
            type: "success",
          });
          return codeStr;
        },
      });
      clipboard.on("error", (e) => {
        this.$message.error("代码复制失败");
      });
    },
    beforeDestroy() {
      window.removeEventListener("keydown", this.preventDefaultSave);
    },
    methods: {
      preventDefaultSave(e) {
        if (e.key === "s" && (e.metaKey || e.ctrlKey)) {
          e.preventDefault();
        }
      },
      onOpen() {
        const { type } = this.generateConf;
        this.htmlCode = makeUpHtml(this.formData, type);
        this.jsCode = makeUpJs(this.formData, type);
        this.cssCode = makeUpCss(this.formData);

        loadBeautifier((btf) => {
          beautifier = btf;
          this.htmlCode = beautifier.html(this.htmlCode, beautifierConf.html);
          this.jsCode = beautifier.js(this.jsCode, beautifierConf.js);
          this.cssCode = beautifier.css(this.cssCode, beautifierConf.html);

          loadMonaco((val) => {
            monaco = val;
            this.setEditorValue("editorHtml", "html", this.htmlCode);
            this.setEditorValue("editorJs", "js", this.jsCode);
            this.setEditorValue("editorCss", "css", this.cssCode);
            if (!this.isInitcode) {
              this.isRefreshCode = true;
              this.isIframeLoaded && (this.isInitcode = true) && this.runCode();
            }
          });
        });
      },
      onClose() {
        this.isInitcode = false;
        this.isRefreshCode = false;
      },
      iframeLoad() {
        if (!this.isInitcode) {
          this.isIframeLoaded = true;
          this.isRefreshCode && (this.isInitcode = true) && this.runCode();
        }
      },
      setEditorValue(id, type, codeStr) {
        if (editorObj[type]) {
          editorObj[type].setValue(codeStr);
        } else {
          editorObj[type] = monaco.editor.create(document.getElementById(id), {
            value: codeStr,
            theme: "vs-dark",
            language: mode[type],
            automaticLayout: true,
          });
        }
        // ctrl + s 刷新
        editorObj[type].onKeyDown((e) => {
          if (e.keyCode === 49 && (e.metaKey || e.ctrlKey)) {
            this.runCode();
          }
        });
      },
      runCode() {
        const jsCodeStr = editorObj.js.getValue();
        try {
          const ast = parse(jsCodeStr, { sourceType: "module" });
          const astBody = ast.program.body;
          if (astBody.length > 1) {
            this.$confirm("js格式不能识别，仅支持修改export default的对象内容", "提示", {
              type: "warning",
            });
            return;
          }
          if (astBody[0].type === "ExportDefaultDeclaration") {
            const postData = {
              type: "refreshFrame",
              data: {
                generateConf: this.generateConf,
                html: editorObj.html.getValue(),
                js: jsCodeStr.replace(exportDefault, ""),
                css: editorObj.css.getValue(),
                scripts: this.scripts,
                links: this.links,
              },
            };

            this.$refs.previewPage.contentWindow.postMessage(postData, location.origin);
          } else {
            this.$message.error("请使用export default");
          }
        } catch (err) {
          this.$message.error(`js错误：${err}`);
          console.error(err);
        }
      },
      generateCode() {
        const html = vueTemplate(editorObj.html.getValue());
        const script = vueScript(editorObj.js.getValue());
        const css = cssStyle(editorObj.css.getValue());
        return beautifier.html(html + script + css, beautifierConf.html);
      },
      exportFile() {
        this.$prompt("文件名:", "导出文件", {
          inputValue: `${+new Date()}.vue`,
          closeOnClickModal: false,
          inputPlaceholder: "请输入文件名",
        }).then(({ value }) => {
          if (!value) value = `${+new Date()}.vue`;
          const codeStr = this.generateCode();
          const blob = new Blob([codeStr], { type: "text/plain;charset=utf-8" });
          saveAs(blob, value);
        });
      },
      showResource() {
        this.resourceVisible = true;
      },
      setResource(arr) {
        const scripts = [];
        const links = [];
        if (Array.isArray(arr)) {
          arr.forEach((item) => {
            if (item.endsWith(".css")) {
              links.push(item);
            } else {
              scripts.push(item);
            }
          });
          this.scripts = scripts;
          this.links = links;
        } else {
          this.scripts = [];
          this.links = [];
        }
      },
    },
  };
</script>

<style lang="scss" scoped>
  @import "@/styles/mixin.scss";
  .tab-editor {
    position: absolute;
    top: 33px;
    bottom: 0;
    left: 0;
    right: 0;
    font-size: 14px;
  }
  .left-editor {
    position: relative;
    height: 100%;
    background: #1e1e1e;
    overflow: hidden;
  }
  .setting {
    position: absolute;
    right: 15px;
    top: 3px;
    color: #a9f122;
    font-size: 18px;
    cursor: pointer;
    z-index: 1;
  }
  .right-preview {
    height: 100%;
    .result-wrapper {
      height: calc(100vh - 33px);
      width: 100%;
      overflow: auto;
      padding: 12px;
      box-sizing: border-box;
    }
  }
  @include action-bar;
  ::v-deep(.el-drawer__header) {
    display: none;
  }
</style>
